 {
 Cosh(0)=1,
 Cosh(1/6*Pi*I)=1/2*Sqrt(3),
 Cosh(1/5*Pi*I)=1/4*(Sqrt(5)+1),
 Cosh(1/4*Pi*I)=1/Sqrt(2),
 Cosh(1/3*Pi*I)=1/2,
 Cosh(2/5*Pi*I)=1/4*(Sqrt(5)-1),
 Cosh(1/2*Pi*I)=0,
 Cosh(3/5*Pi*I)=-1/4*(Sqrt(5)-1),
 Cosh(2/3*Pi*I)=-1/2,
 Cosh(3/4*Pi*I)=-1/Sqrt(2),
 Cosh(4/5*Pi*I)=-1/4*(Sqrt(5)+1),
 Cosh(5/6*Pi*I)=-1/2*Sqrt(3),
 Cosh(Pi*I)=-1,
 Cosh(7/6*Pi*I)=-1/2*Sqrt(3),
 Cosh(6/5*Pi*I)=-1/4*(Sqrt(5)+1),
 Cosh(5/4*Pi*I)=-1/Sqrt(2),
 Cosh(4/3*Pi*I)=-1/2,
 Cosh(7/5*Pi*I)=-1/4*(Sqrt(5)-1), 
 Cosh(8/5*Pi*I)=1/4*(Sqrt(5)-1),  
 Cosh(5/3*Pi*I)=1/2, 
 Cosh(7/4*Pi*I)=1/Sqrt(2),
 Cosh(9/5*Pi*I)=1/4*(Sqrt(5)+1), 
 Cosh(11/6*Pi*I)=1/2*Sqrt(3), 
 Cosh(2*Pi*I)=1, 
   
 Cosh(Infinity)=Infinity,
 Cosh(ComplexInfinity)=Indeterminate
}